State system for ensuring the uniformity of measurements. National standard. Standard reference data. Segnetoelectric ceramic materials based on niobates of sodium and potassium. Dielectric and piezoelectric characteristics at temperatures from 0°C to 100°C
Rectangular iron all-cast moulding boxes having inside dimensions: length from 2400 to 3000 mm, width from 1600 to 2000 mm, height 700; 800 mm. Construction and dimensions
